Daikin REYQ72, Serveice Manual

Page: 169 / 273

Troubleshooting by Indication on the Remote Controller SiUS39-602
158 Troubleshooting
2.27
“
J5
”
Outdoor Unit: Malfunction of Thermistor (R2T) for
Suction Pipe
Remote
Controller
Display
J5
Applicable
Models REYQ72M, 96M
Method of
Malfunction
Detection Malfunction is detected from the temperature detected by the suction pipe temperature
thermistor.
Malfunction
Decision
Conditions When a short circuit or an open circuit in the suction pipe temperature thermistor is detected.
Supposed
Causes
„
Defect of thermistor (R2T) for outdoor unit suction pipe
„
Defect of outdoor unit PC board (A1P)
Troubleshooting
∗
1: Refer to thermistor resistance / temperature characteristics table on P.239.
(V3073)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Resistance
is normal when
measured after
disconnecting the thermistor
(R2T) from the outdoor
unit PC board.
(3.5k
Ω
~
360k
Ω
)
∗
1
Replace outdoor unit PC board
(A1P).
Connect the thermistor and turn
on again.
NO
NO
Replace the thermistor R2T.
YES
YES
Connector
is connected to
X37A, of outdoor unit
PC board.
(A1P)